Evidence for Semileptonic B- to p pbar l nubar Decays
High Energy Physics - Experiment
2014-01-15 v2
Abstract
We find evidence for the semileptonic baryonic decay (), based on a data sample of 772 million pairs collected at the resonance with the Belle detector at the KEKB asymmetric-energy electron-positron collider. A neural-network based hadronic -meson tagging method is used in this study. The branching fraction of is measured to be with a significance of 3.2, where lepton universality is assumed. We also estimate the corresponding upper limit: at the 90% confidence level. This measurement helps constrain the baryonic transition form factor in B decays.
Keywords
Cite
@article{arxiv.1306.3353,
title = {Evidence for Semileptonic B- to p pbar l nubar Decays},
author = {K. -J. Tien and M. -Z. Wang and I. Adachi and H. Aihara and D. M. Asner and V. Aulchenko and T. Aushev and A. M. Bakich and A. Bala and B. Bhuyan and A. Bozek and M. Bračko and T. E. Browder and P. Chang and V. Chekelian and A. Chen and P. Chen and B. G. Cheon and K. Chilikin and R. Chistov and I. -S. Cho and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Doležal and Z. Drásal and D. Dutta and S. Eidelman and H. Farhat and J. E. Fast and T. Ferber and V. Gaur and S. Ganguly and R. Gillard and Y. M. Goh and B. Golob and J. Haba and H. Hayashii and Y. Horii and Y. Hoshi and W. -S. Hou and Y. B. Hsiung and M. Huschle and H. J. Hyun and T. Iijima and A. Ishikawa and R. Itoh and Y. Iwasaki and T. Julius and D. H. Kah and J. H. Kang and E. Kato and T. Kawasaki and H. Kichimi and C. Kiesling and D. Y. Kim and H. J. Kim and J. B. Kim and J. H. Kim and Y. J. Kim and J. Klucar and B. R. Ko and P. Kodyš and S. Korpar and P. Križan and P. Krokovny and B. Kronenbitter and T. Kuhr and T. Kumita and A. Kuzmin and Y. -J. Kwon and S. -H. Lee and J. Li and Y. Li and J. Libby and C. Liu and Y. Liu and D. Liventsev and P. Lukin and K. Miyabayashi and H. Miyata and G. B. Mohanty and A. Moll and R. Mussa and E. Nakano and M. Nakao and Z. Natkaniec and M. Nayak and E. Nedelkovska and C. Ng and N. K. Nisar and S. Nishida and O. Nitoh and S. Ogawa and S. Okuno and S. L. Olsen and W. Ostrowicz and C. Oswald and C. W. Park and H. Park and H. K. Park and T. K. Pedlar and R. Pestotnik and M. Petrič and L. E. Piilonen and M. Ritter and M. Röhrken and A. Rostomyan and H. Sahoo and T. Saito and Y. Sakai and S. Sandilya and D. Santel and L. Santelj and T. Sanuki and Y. Sato and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and D. Semmler and K. Senyo and O. Seon and M. E. Sevior and M. Shapkin and C. P. Shen and T. -A. Shibata and J. -G. Shiu and A. Sibidanov and Y. -S. Sohn and A. Sokolov and S. Stanič and M. Starič and M. Steder and M. Sumihama and T. Sumiyoshi and K. Tanida and G. Tatishvili and Y. Teramoto and M. Uchida and S. Uehara and T. Uglov and Y. Unno and S. Uno and P. Urquijo and S. E. Vahsen and C. Van Hulse and P. Vanhoefer and G. Varner and K. E. Varvell and A. Vinokurova and V. Vorobyev and M. N. Wagner and C. H. Wang and P. Wang and M. Watanabe and Y. Watanabe and K. M. Williams and E. Won and J. Yamaoka and Y. Yamashita and S. Yashchenko and Z. P. Zhang and V. Zhilich and V. Zhulanov and A. Zupanc},
journal= {arXiv preprint arXiv:1306.3353},
year = {2014}
}
Comments
12 pages, 4 figures, submitted to Phys.Rev.Lett